![]() ![]() I followed Yamaha's break in procedure precisely, but wished I had followed the advice of a slew of people who advised me to run it like I stole it during the break in. I am no mechanic, but as I understand it, the honing marks are only there for a short period during break in, and the sooner (especially during break in) and more that you build up heat and pressure in the engine, the sooner the rings will seat properly to provide a seal. But I do think it has something to do with breaking in the rings against the super slick plasma lines walls. All over and over again during a day of fishing. They usually get up, and run as fast as conditions allow from Point A to Point B, and shut down. Obviously, bass fishermen don't do any trolling, and very little idling around, that I know of. But that theory, in my mind, kind of falls apart when you think about where the "making oil" problem first became so infamous.the bass fishermen and the 250 SHO's on their bass boats. Yes, all the 4.2 engines are plasma lined cylinders, done to decrease weight. I only have 5.4 hours on my SHO, and initial thoughts are that it's a BEAST! This will encourage the oil to go back into the crank case (sump tank) and allow the cylinders and rings to seal properly. Get the engine at least level or a slight positive trim on it. As discussed with the mechanic, if you're going to be idling or trolling for prolonged periods of time, trim up some. The fix may not be running the dog mess out your engine though. As you can imagine, this provides a pretty slick cylinder wall, and coupled with excessive oil, you're asking for the very issue some of you are seeing. The cylinders in the SHO (perhaps all Yamaha's now) are plasma infused aluminum no more cast iron sleeves. This excess oil doesn't allow for a good seal for the rings in the cylinder, which allows fuel to get washed into the crank case/oil reservoir. The idea is that that while trolling or idling for long periods of time with the engine at a negative trim, it allows oil to pool on the lower two cylinders. I spoke about the "oil making" in depth with my local Yamaha mechanic, and his theory on it made plenty of sense to me, but I have not researched it to confirm or validate his opinion perhaps the factory opinion or bulletin. But the torque and speed of these motors has to be felt to be believed! I love mine! I went from an F150 to the SHO, and it made my 2007 2200V a completely different animal!!!! ![]() Over the last 30 or 40 hours, I have been running it “like I stole it.” and the making oil issue seems to be subsiding. The only issue has been one that is well known. ![]()
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